Home / 78,122.14-117,186.10-40,161.24

Finding the Fourth Proportional to 78,122.14, 117,186.10 and 40,161.24

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Solution

The fourth proportional to 78,122.14, 117,186.10 and 40,161.24 is: 60,243.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,122.14 : 117,186.10 = 40,161.24 : x
  2. Step 2: Convert to fraction form
    78,122.14/117,186.10 = 40,161.24/x
  3. Step 3: Cross multiply
    78,122.14x = 117,186.10 × 40,161.24
  4. Step 4: Simplify right side
    78,122.14x = 4,706,339,086.76
  5. Step 5: Solve for x
    x = 4,706,339,086.76/78,122.14
  6. Step 6: Final answer
    x = 60,243.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.